flash/nor/rp2xxx: fix endianness error

flash/nor/rp2xxx: fix endianness error

struct rp2xxx_rom_call_batch_record consists of uint32_t in the host
endianness. Therefore it should be converted to the target endianness
not just simply copied by target_write_buffer().

Concatenate algo code, converted batch records and terminator
to the host resident buffer and copy it at once to the target and
save some adapter turnaround times.

While on it remove typedef rp2xxx_rom_call_batch_record_t

Change-Id: I0e698396003869bee5dde4141d48ddd7d62b3cbc
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: https://review.openocd.org/c/openocd/+/8460
Reviewed-by: Jonathan Bell <jonathan@raspberrypi.com>
Tested-by: jenkins